倒计时5秒后跳转页面 为什么倒计时不动？
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script type="text/javascript">
function back(){
window.history.back();
}
var count=document.getElementById("count").innerHTML;
//获取倒计时的值
function count1(){
count--;
document.getElementById("count").innerHTML=count;
if(count==0){
location.assign("www.imooc.com");
}
}
setInterval("count1()",1000);
</script>
</head>
<body>
<h1>操作成功</h1>
<p><span id="count">5</span>秒后返回主页</p>
<a href="javascript:back();">返回</a>
</body>
</html>
觅己网浏览 2001回答 3
3回答
-
stone310
变量count获取失败；将整段js代码放到下面，</body>的上方；补充一点，现在这么写不能加window.onload；如果将setInterval("count1()",1000)这种字符串写法改成setInterval(count1,1000)这么写，就可以加上window.onload；因为字符串写法只能获取全局作用域下的函数，而另一种函数写法则可获取到局部作用域中的函数； -
慕的地8582982
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相关分类
JavaScript